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Abandoned mines › Missouri
Abandoned mine inventory

Abandoned mines in Dent County, Missouri

Dent County, Missouri has 42 mine and prospect features on USGS topographic maps published 1928–1981, including 1 mine openings (shafts, adits and air shafts); 10 of the features carry a name on the map. MSHA's register carries 4 mines in the county with status Abandoned or Abandoned and Sealed.

Every mine and prospect feature the USGS digitized from historical topographic maps covering Dent County, every OSMRE abandoned mine land problem in the county, and every MSHA-registered mine here with status Abandoned. Named features are listed below; unnamed ones are counted by type. Locations are deliberately not shown: this page says what abandoned workings are in the county, not where to find them. They are dangerous and should not be entered.

Mapped mine features (USGS)
42
Mine openings
1
OSMRE problems unreclaimed
0
MSHA mines marked abandoned
4
10 features carry a name0 prospect pits13 quadrangle maps, published 1928–1981 0 MSHA mines abandoned and sealed
What the features are
  1. Mine openings
    shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
    1 2.4%
  2. Mines and surface workings
    labelled mines, open pits, strip mines, placer and hydraulic workings
    27 64.3%
  3. Quarries, gravel and borrow pits
    construction-material and industrial-mineral extraction
    14 33.3%
Named features on the maps10 named · from the USGS compilation
Name on map Feature
Coppage Bank Open Pit Mine
Lennox Bank Open Pit Mine
Nine Sixteen Bank Open Pit Mine
Orchard Mine Open Pit Mine area
Plank Mine Open Pit Mine area
Pomeroy Mine Open Pit Mine area
Riverside Mine Open Pit Mine area
Scotia Iron Mine Open Pit Mine
Simmons Hill Mine Open Pit Mine
Stephens Mine Open Pit Mine

A name is the label printed beside the symbol on the map. "First mapped" is the earliest topographic edition that shows the symbol, which bounds the feature's age from above; it is not the date it was worked. Unnamed features (most prospect pits, adits and shafts carry no label) are in the counts above but not this list.

MSHA-registered mines with status Abandoned4 on register
  1. Dent County Road Dept
    Surface metal/non-metal · Dent County Road Department · MSHA ID 2301966
    Abandoned
  2. Dry Valley Sand And Gravel
    Surface metal/non-metal · Dry Valley Sand And Gravel · MSHA ID 2302450
    Abandoned
  3. Medlock Sand & Gravel
    Surface metal/non-metal · Medlock Sand & Gravel · MSHA ID 2302257
    Abandoned
  4. Parks Sand & Gravel
    Surface metal/non-metal · Parks Sand & Gravel · MSHA ID 2301823
    Abandoned

Status and date are as reported to MSHA by the operator. Each mine's own page carries its accident, citation and inspection record.

By source vocabularythe publishers' own terms
Feature type Features
Open Pit Mine 13
Open Pit Mine 11
Quarry 9
Iron Pit 3
Open Pit Mine or Quarry 3
Quarry 1
Adit 1
Gravel Pit 1
Other counties in MissouriAll counties →
How to read these numbers

A USGS feature is a symbol on a historical topographic map, there when the map was surveyed; it may since have been sealed, reclaimed, built over or reopened as a working mine, and the map does not say which. An OSMRE row is a problem the abandoned mine land program tracks, not a mine. An MSHA mine is a registered operation whose operator reported abandonment, a record that starts in the 1970s. The three overlap and are never added together. The county is assigned from each feature's coordinates against the Census 2023 county boundaries. The full method is on the national page.

Sources
  1. USGS, Consolidated Prospect- and Mine-Related Features from 7.5- and 15-Minute Topographic Quadrangle Maps of the United States (USMIN)
    597,612 point and area features digitized from about 106,350 historical topographic maps published 1886–2006; public domain (CC0). A feature is a map symbol, not a field-verified site, and the map does not say whether it was still worked.
  2. USGS Fact Sheet 2025–3003, The Abandoned Mine Inventory of the United States
    States that as of 2025 there is no comprehensive national inventory of abandoned mine features, and that the detailed national database now being built will not be published.
  3. OSMRE, Abandoned Mine Land Inventory System (e-AMLIS), public Problems layer
    One row per abandoned mine land problem in a problem area, with its type, funding program and reclamation status; mostly coal mined before the 1977 Surface Mining Control and Reclamation Act. Coordinates are the problem area's.
  4. MSHA, Mines dataset (Mine Data Retrieval System)
    Every mine registered with MSHA since the 1970s; a mine reads Abandoned or Abandoned and Sealed when its operator reported that status. Refreshed weekly.
  5. US Census Bureau, 2023 cartographic county boundaries (1:500,000)
    Each feature's county is assigned by its coordinates against these boundaries, not copied from the source file.
  6. GAO-20-238, Abandoned Hardrock Mines (March 2020)
    Federal agencies had identified at least 140,000 abandoned hardrock mine features on federal land and estimated more than 390,000 more not yet captured in their databases.
  7. Abandoned Hardrock Mine Reclamation (AHMR) Program, US Department of the Interior
    The program the USGS inventory is compiled for. Its appropriations and the 674,000 field-confirmed feature count on this page were provided by the program manager, Office of Environmental Policy and Compliance, and are cited with permission (2026-09-08).
  8. IMCC-NAAMLP Hardrock AML Report
    Page 48 carries the two figures this page leans on: USGS estimates 633,181 of the 725,690 mine features it recorded from historic topographic maps, 87 percent, are hardrock; and state and federal agencies have submitted more than 724,000 AML features to the national database being built, already more than the historic maps hold. Year-by-year AHMR funding is on page 35.